ESP-IDF
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Outline
#define _ESP_CPU_UTILS_H
esp_cpu_process_stack_pc(uint32_t)
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/xtensa/include/esp_cpu_utils.h
 
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/* * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 *//* ... */ #ifndef _ESP_CPU_UTILS_H #define _ESP_CPU_UTILS_H #ifdef __cplusplus extern "C" { #endif /** * @brief Fetch the PC value of the previous instruction * * @param pc PC value of the current backtrace frame * *//* ... */ static inline uint32_t esp_cpu_process_stack_pc(uint32_t pc) { if (pc & 0x80000000) { //Top two bits of a0 (return address) specify window increment. Overwrite to map to address space. pc = (pc & 0x3fffffff) | 0x40000000; }{...} //Minus 3 to get PC of previous instruction (i.e. instruction executed before return address) return pc - 3; }{ ... } #ifdef __cplusplus }{...} #endif /* ... */ #endif // _ESP_CPU_UTILS_H
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